A MAJOR operation to clean around 50 years of grime and carbon deposits from one of Liverpool’s most iconic buildings has reached the half-way point.

The Cunard Building, the middle of the Three Graces, is currently undergoing one of the most comprehensive clean-ups – known as a “facade upgrade” – in its history.

Each of the four sides are being cleaned in turn, with contractors working clockwise around the building. Work on the Pier Head side has been completed, and contractors have now moved on to the side facing The Strand.

The comprehensive programme of external refurbishment involves the systematic cleaning of the exterior and repairs to the Portland Stone facade of the Grade II* listed building.

The aim of the work is to return the Cunard Building to its original pristine condition of a century ago.

A special cleaning system is being used to get rid of the build-up of pollution on the building’s elegant facade.

Called nebulous stone cleaning, it removes the need for chemicals and instead uses water vapour to draw out dirt and carbon deposits, which are then washed away using low pressure cold water, returning stone to its original colour.

A key part of the project is the refurbishment of numerous stone balconies, which are being carefully inspected and repaired.

Stone mouldings and a range of sculptures which adorn the building are being carefully assessed for damage and sensitively repaired.

Two large internal light wells – which permits natural light to flood the building – are also being refurbished as part of the scheme, which is on course to be completed in September this year.

ISG is the main contractor, with CB Richard Ellis North West overseeing the project on behalf of the owners of the building, the Merseyside Pension Fund.